SUSE: 2019:0740-1 important: the Linux Kernel (Live Patch 1 for SLE 15)

    Date26 Mar 2019
    CategorySuSE
    338
    Posted ByLinuxSecurity Advisories
    An update that fixes 5 vulnerabilities is now available.
    
       SUSE Security Update: Security update for the Linux Kernel (Live Patch 1 for SLE 15)
    ______________________________________________________________________________
    
    Announcement ID:    SUSE-SU-2019:0740-1
    Rating:             important
    References:         #1124729 #1124734 #1126284 #1127757 #1128378 
                        
    Cross-References:   CVE-2018-12232 CVE-2019-6974 CVE-2019-7221
                        CVE-2019-8912 CVE-2019-9213
    Affected Products:
                        SUSE Linux Enterprise Module for Live Patching 15
    ______________________________________________________________________________
    
       An update that fixes 5 vulnerabilities is now available.
    
    Description:
    
       This update for the Linux Kernel 4.12.14-25_3 fixes several issues.
    
       The following security issues were fixed:
    
       - CVE-2019-9213: Expand_downwards in mm/mmap.c lacked a check for the mmap
         minimum address, which made it easier for attackers to exploit kernel
         NULL pointer dereferences on non-SMAP platforms. This is related to a
         capability check for the wrong task (bsc#1128378).
       - CVE-2019-8912: af_alg_release() in crypto/af_alg.c neglected to set a
         NULL value for a certain structure member, which could have led to a
         use-after-free in sockfs_setattr (bsc#1126284).
       - CVE-2018-12232: In net/socket.c there was a race condition between
         fchownat and close in cases where they target the same socket file
         descriptor, related to the sock_close and sockfs_setattr functions.
         fchownat did not increment the file descriptor reference count, which
         allowed close to set the socket to NULL during fchownat's execution,
         leading to a NULL pointer dereference and system crash (bsc#1127757).
       - CVE-2019-7221: Fixed a user-after-free vulnerability in the KVM
         hypervisor related to the emulation of a preemption timer, allowing an
         guest user/process to crash the host kernel. (bsc#1124734).
       - CVE-2019-6974: kvm_ioctl_create_device in virt/kvm/kvm_main.c mishandled
         reference counting because of a race condition, leading to a
         use-after-free (bsc#1124729).
    
    
    Patch Instructions:
    
       To install this SUSE Security Update use the SUSE recommended installation methods
       like YaST online_update or "zypper patch".
    
       Alternatively you can run the command listed for your product:
    
       - SUSE Linux Enterprise Module for Live Patching 15:
    
          zypper in -t patch SUSE-SLE-Module-Live-Patching-15-2019-740=1 SUSE-SLE-Module-Live-Patching-15-2019-746=1
    
    
    
    Package List:
    
       - SUSE Linux Enterprise Module for Live Patching 15 (ppc64le x86_64):
    
          kernel-livepatch-4_12_14-23-default-9-25.2
          kernel-livepatch-4_12_14-23-default-debuginfo-9-25.2
          kernel-livepatch-4_12_14-25_3-default-8-2.1
          kernel-livepatch-4_12_14-25_3-default-debuginfo-8-2.1
          kernel-livepatch-SLE15_Update_0-debugsource-9-25.2
    
    
    References:
    
       https://www.suse.com/security/cve/CVE-2018-12232.html
       https://www.suse.com/security/cve/CVE-2019-6974.html
       https://www.suse.com/security/cve/CVE-2019-7221.html
       https://www.suse.com/security/cve/CVE-2019-8912.html
       https://www.suse.com/security/cve/CVE-2019-9213.html
       https://bugzilla.suse.com/1124729
       https://bugzilla.suse.com/1124734
       https://bugzilla.suse.com/1126284
       https://bugzilla.suse.com/1127757
       https://bugzilla.suse.com/1128378
    
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